Telegraph instrument



J. V. GUERRA,

TELEGRAPH INSTRUMENT. APPLICATION men MAR. 31, I920.

Patented Aug. 3, 1920.-

* UNITED STATES,

PATENT OFFICE.

JOSE VAR-GAS GUERRAfOF SANTIAGO DE CUBA, CUBA.

, TELEGRAPH mmmem.

T all-whom it may concern:

Be it known thatl, Josie V. GUERRA, a citizen of Cuba, and a resident of Santiago de Cuba, in 'the Province of Oriente and Republic of Cuba, have invented anew and Improved Telegraph Instrument, of which the following is a full, clear,'and exact description. i p

This invention relates to improvements in telegraph instruments, an object of the invention being to provide an improved mounting for the partsof the instrument so that the magnets can be adjusted to vary the gap between the magnet cores and r the armature operated thereby.

A further object is to provide improved means for controlling and adjusting the elastic support of the armature carrying lever and permit an adjustment of i the magnets relative to the armature to pro- V duce the best results.

A further object is to provide an instrument of the character stated embodying in its construction various novel elements c0 operating in the production'of an instrument which isextremelysensitive and adjustable to suit all conditions.

lVith these and other objects in View the invention consists in certain novel features of construction, and combinations and arhereinafter described and pointed out in the claims.

In the accompanying drawings Figure'l is a top plan view;

Fig. 2 is a view in side elevation; and

Fig. 3 is a view in vertical transverse section on the line 3-3 of Fig. 2. r

1 represents the base of my improved in strument which is preferablyv of wood or other similar material, and on which-a metal platform 2 is secured by screws 3 which project through the base and into feet 4 on the plate 2 so that the latter is supported at an elevation above the base. A pair of vertical guide pins 5, 5, are se cured on the plate 2 and operate as guides for a bridge 6, the latter being perforated i Specification of Letters Patent. 1 Patented Aug. 3, 1920. Application filed Marcher 1920. Serial No. 370,287.

the plate 2 'and'support at their upper ends brackets 12 and 13 respectively which are of general rectangular form. A lever 14 is pivotally supported at one end in the bracket 12 by means of screws 15 and at its other end projects into the bracket 13 and is limited in its vertical movement by the bottom of the bracket and by a set screw 16 in the top of the bracket. An armature 1? is secured across the upper face of the lever 14 and has its end portions located above cores 18 of the magnets 8.

A slottedlug 19 projects'at right angles to the bracket 12 and receives an angle arm 20, a set screw 21 being provided in the lug 19 to secure the arm 20 at any desired ele to the center of-the armature 17 and to the lever 14. The bridge 6 is provided centrallywith an internally screw threaded collar 26 which receives a vertical screw 27 having rotary mounting in the plate 2 and projecting below the same. A worm wheel 28 is fixed to the lower portion of the screw 27 and is engaged by a worm 29 on a shaft 30,

the latter projecting to one side of the base 1, supported in suitable bearings 31 and having a knob or finger hold 32 at its outer end to turn the same.

While I have illustrated a receiving instrument, it is obvious that my invention could be applied also to sending instruments.

. When desirable, the magnets 8 can be adjusted verticallyby means of the shaft 30, worm 29, worm wheel 28, screw 27, and internally screw threaded collar 26 on the bridge 6, the pins 5, 5, operating to hold the bridgein proper transverse position,

and the springs 7, 7, afiording an elastic support to hold the bridge against wabbling or angular movement. This vertical movement of the magnets 8 operates to vary the gap between the cores 18 of the magnets a i and the armature 17, so that the desired results can be had in accordance with the current and the general conditions of the apparatus.

The lever 14: with the armature 17 is maintained in elevated position by means of the spring 24 and the tension of the latter can be adjusted by turning the rotary de vice 22, or by elevating the arm 20, or by both of these means to give the desired resistance to the downward movement of the armature when the magnets are energized, and to cause a quick upward movement when the magnets are deenergized.

Various slight changes might be made in the general form and arrangement of parts described without departing from the in vention, and hence I do not limit myself to the precise details set forth, but consider myself at liberty to make such changes and alterations as fairly fall within the spirit and scope of the appended claims.

I claim:

1. A telegraph instrument, comprising a base, a bridge above the base, magnets supported on the bridge, an armature above the magnets, means for guiding the vertical movement of the bridge, and means for adjusting the bridge vertically.

2. A telegraph instrument, comprising a base, a plate on the base, a bridge above the plate, a vertical screw engaging the bridge and causing the vertical movement of the bridge when said screw is turned, a pair of magnets on the bridge, a movable member, an armature on the movable member above the magnets, a worm wheel on the screw, a shaft projecting laterally from the base, a worm on said shaft, and a finger hold on the outer end of the shaft.

3. A telegraph instrument, comprising a base, a plate on the base, a bridge above the cally.

4. A telegraph instrument, comprising a base, a plate above the base, posts on the plate, a lever pivotally connected to one post, means on the other post limiting the pivotal movement of the lever, a bridge above the plate, magnets on the bridge, an armature carried by the lever above the magnets, a lug projecting from one of the posts, an. angle arm adjustably secured to said lug, a spring connecting said arm with the lever holding the lever in elevated position, and means for adjusting the magnets vertically.

5. A telegraph instrument, comprising a base, a plate above the base, posts on the plate, a lever pivotally connected to one post, means on the other post limiting the pivotal movement of the lever, a bridge above the plate, magnets on the bridge, an armature carried by the lever above the magnets, a lug projecting from one of the posts, an angle arm adjustably secured to said lug, aspring connecting said arm with the lever holding the lever in elevated position, and means on the arm for adjusting the tension of the spring.

J OSE VAR-GAS GUERRA. 

